Laravel + MongoDB: Update nested value in Model

Question

I have Model with a deeply nested attribute:

$model = Model::create();
$model->nested_prop = ['foo' => ['bar' => ['x' => 1]]];
$model->save();

In another method I want to modify a single value. This does not work, I get "Indirect modification of overloaded property ... has no effect".:

$model = Model::find ($request->model_id);
$model->nested_prop['foo']['bar']['x'] = 2;
$model->save();

Is there a convenient way of updating a single value without constructing the whole nested structure from scratch?

Does this framework allow dot-notation? { $set: { "nested_prop.foo.bar.x": 2 } } works in Mongo Playground: mongoplayground.net/p/lh7bb6x9-BI. So maybe $model->nested_prop['foo.bar.x'] = 2; ? — aneroid
– aneroid, Commented Oct 23 at 12:51

reza_qsr · Accepted Answer · 2025-10-23 22:58:37Z

2

I hope These Method Help You :

$model = Model::find($request->model_id);
$nested = $model->nested_prop;
$nested['foo']['bar']['x'] = 2;
$model->nested_prop = $nested;
$model->save();

OR

$model = Model::find($request->model_id);
data_set($model->nested_prop, 'foo.bar.x', 2);
$model->save();

answered Oct 23 at 22:58

reza_qsr

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Comments

Kais Chrif · Accepted Answer · 2025-10-25 07:15:18Z

Updating elements within a nested array of objects:

When dealing with a nested array of objects, you need to identify the specific element within the array to update. This often involves using a query to target the correct element and then employing MongoDB's positional operators or array filters.

1. Using the positional operator ($) for the first matching element:

This method updates the first element in the array that matches the where clause.

Code

use App\Models\YourModel;

YourModel::where('document_id', 'your_document_id')
    ->where('nested_array.field_to_match', 'value_to_match')
    ->update(['nested_array.$.field_to_update' => 'new_value']);

2. Using array filters for specific elements in a nested array (more advanced):

For more complex scenarios where you need to update multiple elements or elements based on conditions within the array itself, array filters provide more flexibility.

Code

use App\Models\YourModel;

YourModel::where('document_id', 'your_document_id')
    ->update(
        [
            '$set' => [
                'nested_array.$[elem].field_to_update' => 'new_value'
            ]
        ],
        [
            'arrayFilters' => [
                ['elem.field_to_match' => 'value_to_match']
            ]
        ]
    );

In this example, $[elem] is the array filter, and elem.field_to_match is the condition that determines which elements in the nested_array will have their field_to_update modified.

Important Considerations:

Model Definition:

Ensure your Laravel Model for MongoDB correctly defines the connection and collection.
Data Structure:

Understand your MongoDB document's nested structure to correctly target the fields you want to update.
Error Handling:

Implement appropriate error handling for scenarios where documents or nested elements might not be found.

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